Each LV wallet has a number. Genuine wallets come with a number. Normally it is a letter + 5 digits, such as N60015. In addition, all LV products have a unique taste, which is a potion used by LV's proprietary bag flavor to treat the bag material. You can also tell by smelling the potion.

Extended information:

The Louis Vuitton Intellectual Property Department is responsible for managing 12,000 intellectual property rights including trademarks, designs and copyrights, with approximately 250 employees worldwide. Headquartered in Paris with regional offices virtually around the world, including a dedicated team of lawyers and former law enforcement figures, it launches tens of thousands of anti-counterfeiting raids each year.

Fighting counterfeiting is an important long-term component of Louis Vuitton’s global sustainability strategy. Protecting the creations and rights of designers, artists and brands is of vital significance to their long-term survival.

Reference: Louis Vuitton official website-Brand Protection